Environment-friendly microemulsion capable of being dispersed into nano liquid drops in situ and preparation method thereof
A micro-emulsion and nano-level technology, applied in the field of water-based drilling fluid, can solve the problems of low internal phase content of nano-emulsion and damage of micro-emulsion system, achieve excellent lubrication effect, reduce transportation cost, and facilitate transportation and storage
Inactive Publication Date: 2015-11-11
CHINA NAT OFFSHORE OIL CORP +2
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Problems solved by technology
However, since the water-based drilling fluid contains a large amount of water, if the microemulsion is applied to the water-based drilling fluid, the composition content of the microemulsion will be changed, which may lead to the destruction of the microemulsion system, even if the microemulsion system is After being destroyed, it is diluted with water to form a nanoemulsion, and the internal phase content in the formed nanoemulsion is also very low, no more than 5%.
Method used
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Effect test
Embodiment 1
[0024] Weigh 18.5g of Tween80, 5g of water, 2.5g of D230 and 74g of biodiesel respectively, stir at room temperature at a speed of 300rpm for 20min until uniformly mixed, and obtain the microemulsion of the present application.
Embodiment 2
[0026] Weigh 23.75g of Tween80, 5g of water and 71.25g of biodiesel respectively, and stir at room temperature at a speed of 500rpm for 20min until they are evenly mixed to obtain the microemulsion of the present application.
Embodiment 3
[0028] Weigh 45g of Tween80, 7g of water, 3g of M1000 and 45g of biodiesel respectively, and stir at room temperature at a speed of 100rpm for 20min until the microemulsion of the present application is obtained.
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The invention discloses an environment-friendly microemulsion capable of being dispersed into nano liquid drops in situ, and a preparation method and application thereof. The microemulsion comprises the following components in parts by weight: 18.5-45 parts of emulsifier, 5-10 parts of water, 0-3 parts of assistant and the balance of biodiesel, totaling 100 parts. The microemulsion has favorable high-temperature stability, solves the problem that the existing nano emulsion treating agent can easily fail in a severe environment, does not generate environmental pollution by using green degradable biodiesel as the raw material, and has favorable lubricating effect. Besides, the microemulsion can be dispersed into nano liquid drops in water in situ, and can perform favorable lubricating and plugging effects on micro / nano cracks in well drilling when being used as a treating agent of the water-base drilling fluid.
Description
technical field [0001] The present application relates to the field of water-based drilling fluids, in particular to an environment-friendly microemulsion capable of in-situ dispersion into nano-scale droplets and its preparation method and application. Background technique [0002] Water-based drilling fluid is a multiphase unstable mixture system, mainly including colloidal particles of bentonite, polymer, cellulose or lignite, etc. Nanoemulsion is used as a treatment agent for water-based drilling fluids, and has the following characteristics: 1. Surface effect, that is, it has a very large specific surface area and high surface activity; 2. Small size effect, that is, due to the smaller particle size, resulting in The specific surface area is significantly increased, causing changes in the macroscopic physical properties to change the properties of the drilling fluid colloid. Studies have found that nanoemulsions can not only improve the inhibition and lubricity of wate...
Claims
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IPC IPC(8): C09K8/12
CPCC09K8/12C09K2208/34
Inventor 赵春花夏小春孙德军苗海龙耿铁童坤
Owner CHINA NAT OFFSHORE OIL CORP
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